Clinical studies have shown that alkaloids in Huperzine A help prevent the breakdown of acetylcholine, a primary neurotransmitter for memory and concentration. It has also been shown to enhance alertness and focus thought processes.

GoldBamboo

... In traditional Chinese medicine, a particular type of club moss identified as qian ceng ta in China or Chinese club moss in other parts of the world, has been used for centuries to treat inflammation and fever. While no scientific evidence supports these historical uses, Chinese club moss plants are known to contain chemicals that may promote the loss of water from the body. The resulting mild diuretic action may help to reduce swelling due to water retention. ...
Drug Digest - more...

Huperzine A Image:Huperzine A.jpg General Systematic name 1-amino-13 ...
Wikipedia - [full article]

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